window.onload = function () {
	hideAlldd();
};

function hideAlldd () {
	var dls = document.getElementById('menu').getElementsByTagName('dl');
	for(var i = 0; i < dls.length; i++) {
		dls[i].className = 'ddhide';
	}
}

function show (obj) {
	obj.className = 'ddshow';
}

function hide (obj) {
	obj.className = 'dlhide';
}